macronutrientPronunciation: /ˌmakrəʊˈnjuːtrɪənt/Definition of macronutrient noun Biology 1a type of food (e.g. fat, protein, carbohydrate) required in large amounts in the diet. 2a chemical element (e.g. potassium, magnesium, calcium) required in large amounts for plant growth. macronutrient in other Oxford dictionaries Definition of macronutrient in the US English dictionary
